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<br />1 <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />HYDROLOGY II-33 <br /> <br />the following written comments concerning the operation of the intake were <br />received from Mr. McCormick. <br /> <br />1. During the winter (November-March), there Is approximately 20 - 25 <br />cfs in the river. All the flow in the river is directed to the <br />east side of the stream bed at Union Avenue. The radial gate is <br />usually operated manually during winter because the gate has <br />frozen several times. We open the radial gate fully once or twice <br />a week to remove the sand that has accumulated in the intake <br />channel. <br /> <br />Moss and algae tend to accumulate on the intake screens and is <br />physically removed by a high pressure hose or a wire brush. <br />During the cleaning, the' operators stand on the concrete channel <br />wall. <br /> <br />2. During the annual runoff period (April-June), there is <br />approximately 500 cfs flowing in the river. The main problem <br />during this time is sand accumulating in the primary intake <br />channel. The sand causes poor flows along the channel so the <br />secondary intake has been opened to make up for the primary intake <br />losses. When the secondary intake has been used, there have been <br />problems with sand entering the secondary intake which causes a <br />sand bar in the reservoir. The sand bar last year was <br />approximately 25 feet long, 15 feet wide, and 7 feet high. <br /> <br /> <br />The debris boom log also causes a problem during this period <br />because the high river flow causes the boom to submerge, allowing <br />logs and other debris to wedge near the radial gate instead of <br />flowing over the dam. <br />